Miner s safety-lam p



Patented Jan. 26,1897.-

W. PATTERSON. MINERs 'SAFETY LAMP.

(No Model.)

UNITED STATES ATENT Ferca.

lVILLIAM PATTERSON, OF SCRANTON, PENNSYLVANIA.

IVIINERS SAFETY-LAM P.

SPECIFICATION forming part of Letters Patent No. 575,903, dated January26, 1897.

Application tiled April 28, 1896. Serial No. 588,845. (No model.)Patented in England November 17, 1890, No. 18,510.

To all whom it may concer/L.'

. Be it known that I, WILLIAM PATTERSON, a subject of the Queen of GreatBritain and Ireland, residing in the city of Scranton, county ofLackawanna, State of Pennsylvania, have invented a new and usefulImprovement in Miners Safety-Lamps, which improvement is fully set forthin the following specification and accompanying drawings, and for whichLetters Patent have been granted in Great Britain, No. 18,510, datedNovember 17, 1890.

My invention consists of a miners safetylamp having a case -top andlower rings, formed as describedv and claimed, whereby the omission ofany of the said parts in assembling the same will be readily detected,owing to the inability or failure of the connection ofthe same.

It further consists in the combination and arrangement of the partshereinafter described and claimed.

Figure l represents a side view of a lamp embodying my invention. Fig. 2represents a vertical section of a lamp embodying my invention in whichone gauze and ring is used. Fig. 3 represents a vertical section of lampembodying my invention in which two gauzes with rings are used.

Similar letters indicate like parts in the I other suitable manner isthe annular metallic topf G designates a glass cylinder or globe whichis supported on the holder H, the latter being adjustable in the ring J.The upper end of the cylinder G bears against a shoulder S on the innerface of the ring d. The rotatable screw-threaded holder H supports saidcylinder, operating the same. Washers of asbestos are preferably placedbetween the ends of the cylinder and the ring d and support H, so as toform tight joints.

In Fig. 3 an outer gauze b With its ring d, having a flange P, bearingagainst the shoulder O, as in ligure, is shown; but there is also aninner gauze C with its ring E, the latter ring being below the ring` dand having an outwardly-extending flange R, which bears against thelower end of the ring d to prevent its entrance into the same. The lowerend of the said ring E has a shoulder on its inner face, against whichbears the cylinder G, which is supported on a ring H, as in Fig. 2. Theexternal diameter of the ring E is such that it would pass through theshoulder O if the ring CZ were removed or absent, so that the partscould not be properly assembled or put together were said ring d withits gauze to which it is secured left out, while if the ring E with itsgauze c were omitted the glass cylinder would pass into the bonnet ofthe lamp.

It is evident that any omission or absence of the parts is readily seenwhen the lamp is being put together, as such omission prevents theproper assembling of the parts.

Having thus described my invention, What I desire to claim and secure byLetters Patent isn v 1. In a miners safety-lamp, a bonnet havingattached thereto at its lower end a Casetop with an inwardly-extendingflange forming a shoulder, a gauze having a ring with anoutwardly-extending fla-nge adapted to abut against said shoulder andthe case-top, and means for receiving the upper end of the glass of thelamp adapted to be prevented by said gauze-ring from entering saidbonnet, the said glass normally passing through said case-top.

2. In a miners safety-lamp, a bonnet havlng a case-top with aninwardly-extending flange forming a shoulder, a gauze with a r1n g IOOnormally ada-pied to pass through the oase-top of said bonnet if thefirst ganze be omitted.

\VILLIAM PATTERSON.

W itnosses:

GEORGE S. MARTIN, PATRICK- MCNULTY.

